FROM : http://blog.csdn.net/ronghua_liu/article/details/8609450 当运行apt-get update后出现如下错误时:E: Some index files failed to download, they have been ignored, or old ones used instead. 可以将目录下/var/lib/apt/lists/partial/所有的文件清掉,再次运行apt-get update即可!自带源在大陆不好